/*
 * Copyright (c) 2014-2016 Alex Spataru <alex_spataru@outlook.com>
 *
 * This file is part of the QSimpleUpdater library, which is released under
 * the DBAD license, you can read a copy of it below:
 *
 * DON'T BE A DICK PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING,
 * DISTRIBUTION AND MODIFICATION:
 *
 * Do whatever you like with the original work, just don't be a dick.
 * Being a dick includes - but is not limited to - the following instances:
 *
 * 1a. Outright copyright infringement - Don't just copy this and change the
 *     name.
 * 1b. Selling the unmodified original with no work done what-so-ever, that's
 *     REALLY being a dick.
 * 1c. Modifying the original work to contain hidden harmful content.
 *     That would make you a PROPER dick.
 *
 * If you become rich through modifications, related works/services, or
 * supporting the original work, share the love.
 * Only a dick would make loads off this work and not buy the original works
 * creator(s) a pint.
 *
 * Code is provided with no warranty. Using somebody else's code and bitching
 * when it goes wrong makes you a DONKEY dick.
 * Fix the problem yourself. A non-dick would submit the fix back.
 */

#ifndef _QSIMPLEUPDATER_MAIN_H
#define _QSIMPLEUPDATER_MAIN_H

#include <QUrl>
#include <QList>
#include <QObject>

#if defined(QSU_SHARED)
#   define QSU_DECL Q_DECL_EXPORT
#elif defined(QSU_IMPORT)
#   define QSU_DECL Q_DECL_IMPORT
#else
#   define QSU_DECL
#endif

class Updater;

/**
 * \brief Manages the updater instances
 *
 * The \c QSimpleUpdater class manages the updater system and allows for
 * parallel application modules to check for updates and download them.
 *
 * The behavior of each updater can be regulated by specifying the update
 * definitions URL (from where we download the individual update definitions)
 * and defining the desired options by calling the individual "setter"
 * functions (e.g. \c setNotifyOnUpdate()).
 *
 * The \c QSimpleUpdater also implements an integrated downloader.
 * If you need to use a custom install procedure/code, just create a function
 * that is called when the \c downloadFinished() signal is emitted to
 * implement your own install procedures.
 *
 * By default, the downloader will try to open the file as if you opened it
 * from a file manager or a web browser (with the "file:*" url).
 */
class QSU_DECL QSimpleUpdater : public QObject
{
   Q_OBJECT

signals:
   void checkingFinished(const QString &url);
   void appcastDownloaded(const QString &url, const QByteArray &data);
   void downloadFinished(const QString &url, const QString &filepath);

public:
   static QSimpleUpdater *getInstance();

   bool usesCustomAppcast(const QString &url) const;
   bool getNotifyOnUpdate(const QString &url) const;
   bool getNotifyOnFinish(const QString &url) const;
   bool getUpdateAvailable(const QString &url) const;
   bool getDownloaderEnabled(const QString &url) const;
   bool usesCustomInstallProcedures(const QString &url) const;

   QString getOpenUrl(const QString &url) const;
   QString getChangelog(const QString &url) const;
   QString getModuleName(const QString &url) const;
   QString getDownloadUrl(const QString &url) const;
   QString getPlatformKey(const QString &url) const;
   QString getLatestVersion(const QString &url) const;
   QString getModuleVersion(const QString &url) const;
   QString getUserAgentString(const QString &url) const;

public slots:
   void checkForUpdates(const QString &url);
   void setModuleName(const QString &url, const QString &name);
   void setNotifyOnUpdate(const QString &url, const bool notify);
   void setNotifyOnFinish(const QString &url, const bool notify);
   void setPlatformKey(const QString &url, const QString &platform);
   void setModuleVersion(const QString &url, const QString &version);
   void setDownloaderEnabled(const QString &url, const bool enabled);
   void setUserAgentString(const QString &url, const QString &agent);
   void setUseCustomAppcast(const QString &url, const bool customAppcast);
   void setUseCustomInstallProcedures(const QString &url, const bool custom);
   void setMandatoryUpdate(const QString &url, const bool mandatory_update);

protected:
   ~QSimpleUpdater();

private:
   Updater *getUpdater(const QString &url) const;
};

#endif
